玩火自焚

stir up the fire and you get burnt (idiom); to get one's fingers burnt; fig. to suffer on account of one's own meddling

to play with fire

to invite trouble

to court disaster (idiom); to dig one's own grave

lit. to eat one's own bitter fruit (idiom); fig. to suffer the consequences of one's own actions

to eat one's own fruit (idiom); fig. suffering the consequences of one's own action; to reap what one has sown